The effect of low temperature heat treatment on stress corrosion crack initiation in machined 316L stainless steel in high-temperature hydrogenated water

SCRIPTA MATERIALIA

卷:195

Article

Chang, Litao^1,2  Mukahiwa, Kudzanai¹  Duff, Jonathan¹  Burke, M. Grace¹  Scenini, Fabio¹ 

[1] Univ Manchester, Dept Mat, Mat Performance Ctr, Manchester M13 9PL, Lancs, England

[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

关键词: Ultrafine-grains;    Austenitic stainless steel;    Heat treatment;    Stress corrosion cracking;    High-temperature water;   

DOI  :  10.1016/j.scriptamat.2021.113742

来源: Elsevier

【 摘 要 】

A notable reduction of the stress corrosion cracking (SCC) initiation susceptibility was identified for machined cold-rolled 316L stainless steel that received a 650 degrees C/10 hours heat-treatment prior to slow strain rate tensile (SSRT) testing in high-temperature hydrogenated water. The cracks per unit area of the machined surface of heat-treated specimens decreased by , 50% compared to as-machined surfaces, and by >70% with respect to polished surfaces. The results were ascribed to recrystallization of the ultrafine-grains present in the outer deformation layer of the machined surface, which resulted in a reduction of the tensile residual stress and nano-indentation hardness. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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